Laws of Thermodynamics Thermodynamics is the study of the inter-relation between heat, work and internal energy of a system. These three laws are, •First Law of Thermodynamics: –AKA:Law of Conservation of Energy –suggests that energy can be transferred from one system to another in many forms –it cannot be created or destroyed •total amount of energy available in the Universe is constant –relationship between energy and matter •E=mc2 –energy and matter are interchangeable •Second Law of Thermodynamics: –Heat cannot be transfer from a colder to a hotter body –predicts that the entropy of an isolated system always increases with time •measure of the disorder or randomness of energy and matter in a system •Third Law of Thermodynamics: –if all the thermal motion of molecules (kinetic energy) were removed----state of absolute zero •Absolute Zero = 0 Kelvins = -273.15° Celsius –The Universe will attain absolute zero when all energy and matter is randomly distributed across space
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Environmental Impact: Wind Energy-
absolutely no air pollution
windmills take up a lot of land space
birds are electrocuted/collide with the machines created to produce wind energy
extremely noisy
Solar Energy-
absolutely no air pollution
health/safety hazards for workers that come into contact with them
solar power plants take up a lot of land space
Geothermal Energy-
produces air and water pollution
need a safe disposal place for hazardous waste and land subsidence
geothermal power plants require a large amount of water
creates large amounts of noxious fumes
Biomass-
air pollution
resource needs to be managed very carefully
Hydropower-
no air pollution or greenhouse gases produced
dams being built can cause huge changes in river’s ecosystems
Thermodynamics is the study of the inter-relation between heat, work and internal energy of a system. These three laws are,
•First Law of Thermodynamics:
–AKA:Law of Conservation of Energy
–suggests that energy can be transferred from one system to another in many forms
–it cannot be created or destroyed
•total amount of energy available in the Universe is constant
–relationship between energy and matter
•E=mc2
–energy and matter are interchangeable
•Second Law of Thermodynamics:
–Heat cannot be transfer from a colder to a hotter body
–predicts that the entropy of an isolated system always increases with time
•measure of the disorder or randomness of energy and matter in a system
•Third Law of Thermodynamics:
–if all the thermal motion of molecules (kinetic energy) were removed----state of absolute zero
•Absolute Zero = 0 Kelvins = -273.15° Celsius
–The Universe will attain absolute zero when all energy and matter is randomly distributed across space
Environmental Impact:
Wind Energy-
Solar Energy-
Geothermal Energy-
Biomass-
Hydropower-
- no air pollution or greenhouse gases produced
dams being built can cause huge changes in river’s ecosystems